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#pragma once
#include <cuda.h>
#include <iostream>
void set_device(int device_id)
{
cudaSetDevice(device_id);
}
void list_devices(void)
{
int deviceCount;
CUDA_SAFE_CALL(cudaGetDeviceCount(&deviceCount));
if (deviceCount == 0)
std::cout << "There is no device supporting CUDA" << std::endl;
for (int dev = 0; dev < deviceCount; ++dev) {
cudaDeviceProp deviceProp;
CUDA_SAFE_CALL(cudaGetDeviceProperties(&deviceProp, dev));
if (dev == 0) {
if (deviceProp.major == 9999 && deviceProp.minor == 9999)
std::cout << "There is no device supporting CUDA." << std::endl;
else if (deviceCount == 1)
std::cout << "There is 1 device supporting CUDA" << std:: endl;
else
std::cout << "There are " << deviceCount << " devices supporting CUDA" << std:: endl;
}
std::cout << "\nDevice " << dev << ": \"" << deviceProp.name << "\"" << std::endl;
std::cout << " Major revision number: " << deviceProp.major << std::endl;
std::cout << " Minor revision number: " << deviceProp.minor << std::endl;
std::cout << " Total amount of global memory: " << deviceProp.totalGlobalMem << " bytes" << std::endl;
}
std::cout << std::endl;
}
template <typename T>
T l2_error(size_t N, const T * a, const T * b)
{
T numerator = 0;
T denominator = 0;
for(size_t i = 0; i < N; i++)
{
numerator += (a[i] - b[i]) * (a[i] - b[i]);
denominator += (b[i] * b[i]);
}
return numerator/denominator;
}
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